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  1. #1
    Junior Member
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    Crank BB interface hardware - problem

    I've installed a ritchey compact crank on a new ultegra BB. They are both ISIS. I attached the crankset then placed on a washer and tightend the crank bolt. That's it. It keeps loosening and creaking.

    In addition to the hardware mentioned above, the crankset came with a doughnut shaped threaded ring with the holes in it, a plastic washer and a metal washer. I'm assuming I need to add these to the crank to prevent the creaking and loosening. I can add the doughnut thing, but what about the additional washers? What is the order of assembly?

    I am new to ISIS. Thanks for your help!

  2. #2
    Senior Member sydney's Avatar
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    For starters it is octalink,not isis. The donut thingy is the self axtractor.It doesn't have to be there to keep the crank bolt tight.www.parktool.com has the installation drill.IIRC,thin metal washer goes in first then the bolt and a plastic washer on top of the bolt and then the donut thingy. If you didn't line up the spindle splines with the crankarm splines before honking down on the fixing bolt,you may have hosed the interface.

  3. #3
    Senior Member
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    Is the Ritchey crank Octalink? If it's ISIS (the bb is certainly Octalink) then the crank is ruined already.

  4. #4
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    Sydney - thanks for the terminology correction. I don't think I hosed the interface as the crank meshed nicely with the BB before installation, and i was mindful of alignment.

    So if the self extractor doesn't hold in the crank bolt do you have any idea why it comes loose?

    Also, what is IIRC?

    Thanks!

  5. #5
    Senior Member sydney's Avatar
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    A properly torqued crank bolt that won't stay tight is often an indication that the crank interface is buggered. The self extractors are not part of the probelm. They do not keep the bolt frome loosening,but would keep it from backing too far out. I typically don't use the self extractors and have no problems. IIRC = if I recall correctly.

  6. #6
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    thanks sydney - all is clear - i'll inspect the interface more carefully and see if I can figure it out.

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